import axios from 'axios'
import { Message, MessageBox, Loading } from 'element-ui'
import store from '@/store'
import { getToken } from '@/utils/auth'

axios.defaults.headers.post['Content-Type'] = 'application/json'

// create an axios instance
const service = axios.create({
  baseURL: process.env.VUE_APP_BASE_API, // url = base url + request url
  withCredentials: true, // send cookies when cross-domain requests
  timeout: 30000 // request timeout
})
let loadingInstance
// request interceptor
service.interceptors.request.use(
  config => {
    // do something before request is sent
    if (store.getters.token) {
      // let each request carry token
      // ['X-Token'] is a custom headers key
      // please modify it according to the actual situation
      config.headers['Authorization'] = 'Bearer ' + getToken()
    }
    config.headers['Logintype'] = store.getters.loginType
    config.headers['Version'] = 'V1.0'
    loadingInstance = Loading.service({ fullscreen: true })
    return config
  },
  error => {
    const err = error.response.data || { 'message': '网络开小差了……' }
    Message({
      message: err.message,
      type: 'error',
      duration: 5 * 1000
    })
    loadingInstance.close()
    return Promise.reject(error)
  }
)

// response interceptor
service.interceptors.response.use(
  /**
   * If you want to get http information such as headers or status
   * Please return  response => response
   */

  /**
   * Determine the request status by custom code
   * Here is just an example
   * You can also judge the status by HTTP Status Code
   */
  response => {
    loadingInstance.close()
    const res = response.data
    // if the custom code is not 20000, it is judged as an error.
    if (res.code !== 200) {
      Message({
        message: res.message || '网络开小差了……',
        type: 'error',
        duration: 5 * 1000
      })

      // 50008: Illegal token; 50012: Other clients logged in; 50014: Token expired;
      if (res.code === 50008 || res.code === 50012 || res.code === 50014) {
        // to re-login
        MessageBox.confirm('You have been logged out, you can cancel to stay on this page, or log in again', 'Confirm logout', {
          confirmButtonText: 'Re-Login',
          cancelButtonText: 'Cancel',
          type: 'warning'
        }).then(() => {
          store.dispatch('user/resetToken').then(() => {
            location.reload()
          })
        })
      }
      return Promise.reject(new Error(res.msg || 'Error'))
    } else {
      return res
    }
  },
  error => {
    loadingInstance.close()
    const err = error.response.data || { 'message': '网络开小差了……' }
    if (error.response.status === 500) {
      Message({
        message: "网络开小差了……",
        type: 'error',
        duration: 5 * 1000
      })
      return Promise.reject(error)
    }
    if (error.response.status === 401) {
      store.dispatch('user/resetToken').then(() => {
        location.reload()
      })
    }
    Message({
      message: err.message,
      type: 'error',
      duration: 5 * 1000
    })
    return Promise.reject(error)
  }
)
export default service
